On a 4S1P lipo, what does the 1P mean??

[xviper]

Wow.. That was differnet just asking what is a 1P. I was going to ask how do you size a motor, ESC, Prop and the right battery. Maybe I'll save it for another time.

Wise choice! But nevertheless, I just combine whatever I have on hand and fly it till something blows up.

[TSHobbies]

Is there any downside to using the "1P" lipos? just curious,since they seem to runa bit cheaper than the others.